JP4897465B2 - Evaporative cooling device - Google Patents

Description

  The present invention relates to an evaporative cooling device that cools an object to be cooled in a cooling chamber by latent heat of vaporization of a cooling fluid.

  The evaporative cooling device has a cooling fluid line connected to the evaporative cooling chamber and a cooling chamber connected to the suction means, and can evaporate and cool a cooling object with latent heat of vaporization of the cooling fluid.

In this evaporative cooling device, a part of the cooling fluid supplied to the evaporative cooling chamber jumps off from the reaction surface that collides with the outer surface of the evaporative cooling chamber and separates from the outer surface, so that evaporative cooling cannot be performed efficiently. There was a problem.
Japanese Utility Model Publication No. 5-37181

  The problem to be solved is to prevent the cooling fluid from jumping on the outer surface of the evaporative cooling chamber, and a larger amount of the supplied cooling fluid removes heat from the object to be vaporized and efficiently evaporates. It is to provide a vaporization cooling device that can be cooled.

The present invention forms a cooling chamber for cooling an object to be cooled, connects a cooling fluid supply pipe for supplying a cooling fluid in a tangential direction of the outer wall surface of the cooling chamber, and connects the cooling chamber to suction means In which a nozzle for injecting a cooling fluid is attached to the cooling chamber side end of the cooling fluid supply pipe, the nozzle is formed by at least two cooling fluid injection ports, and one cooling fluid injection port is connected to the outside of the cooling chamber. a fluid film forming openings for forming a fluid film on the wall, and the other cooling fluid injection port for spraying a cooling fluid and on the fluid film in a tangential direction of the outer wall surface of the cooling chamber the cooling fluid spray nozzle, the cooling fluid This prevents jumping on the outer wall surface .

  The vaporization cooling apparatus of the present invention forms a fluid film on the outer surface of the cooling chamber with the cooling fluid supplied from the fluid film formation port by forming the fluid film formation port and the cooling fluid spray port in the cooling fluid injection nozzle, By supplying the cooling fluid from the cooling fluid spray port onto the fluid film, it is possible to prevent the cooling fluid from jumping and efficiently evaporate and cool.

  The present invention forms the fluid film forming port and the cooling fluid spray port in the cooling fluid jet nozzle, but the fluid film forming port and the cooling fluid spray port may be integrally formed in one nozzle, or A separate fluid film forming port and a cooling fluid spray port may be combined to form a single nozzle.

In the present embodiment, an example in which the jacket portion 2 of the reaction kettle 1 is used as a cooling chamber is shown. An object to be cooled (not shown) placed inside the reaction kettle 1 is cooled by a cooling fluid as a cooling source supplied to the jacket portion 2.

  A jacket portion 2 is formed over substantially the entire circumference of the reaction kettle 1, and a combined vacuum pump 4 as a suction means and a cooling fluid supply pipe 5 are connected to the jacket portion 2. The cooling fluid supply pipe 5 is connected to a cooling fluid pipe 6 disposed in the jacket portion 2 via an ejector 18 serving as a heat exchange portion.

The ejector 18 is disposed at a position as close as possible to the jacket portion 2, and a heating steam supply pipe 19 is connected to the suction port of the ejector 18. The cooling fluid supplied from the cooling fluid supply pipe 5 and the heating steam supplied from the steam supply pipe 19 are mixed in the ejector 18, controlled to a predetermined temperature, and supplied to the cooling fluid pipe 6. The

By disposing the ejector 18 in the vicinity of the jacket portion 2, the cooling fluid can be supplied to the cooling fluid conduit 6 until the temperature of the cooling fluid controlled to a predetermined temperature by the ejector 18 changes. 2 can be supplied with a cooling fluid controlled with high temperature accuracy.

As shown in FIG. 2, the end portion of the cooling fluid pipe 6 disposed in the jacket portion 2 is a nozzle 25, and the nozzle 25 is formed by two cooling fluid injection ports 27 and 28, and one cooling fluid injection port is formed. Is a fluid film forming port 27 for forming a fluid film on the outer wall surface of the reaction kettle 1, and the other cooling fluid injection port is a cooling fluid for spraying the cooling fluid in the tangential direction of the outer wall surface of the reaction kettle 1 and on the fluid film. The spray port 28 is used.

Cooling fluid is ejected from the fluid film forming port 27 and the cooling fluid spraying port 28 as shown by straight lines 29 and 30 in FIG. 2, and the cooling fluid 29 forms a thin film fluid film on the outer surface of the reaction vessel 1. At the same time, the cooling fluid 30 is sprayed onto the fluid film, so that the cooling fluid 30 can be prevented from jumping on the outer surface of the reaction vessel 1.

  The lower part of the cooling fluid supply pipe 5 is connected to a part of the circulation path 15 of the combination vacuum pump 4 and the upper part is connected to one end part of the cooling fluid pipe 6. The cooling fluid pipe 6 is arranged in a spiral shape in the jacket portion 2, and a plurality of cooling fluid injection nozzles 25 are provided on the reaction kettle 1 side of the cooling fluid pipe 6 as shown in FIG. 2.

  In this embodiment, a steam supply pipe 8 with a flow rate adjusting valve 7 interposed is connected to the upper left portion of the jacket portion 2. By supplying the steam for heating at a predetermined pressure, that is, a predetermined temperature from the steam supply pipe 8 to the jacket part 2, the object to be heated in the reaction kettle 1 can be heated.

  A discharge pipe 9 is connected to the lower right side of the jacket portion 2 and connected to the ejector 10 of the combination vacuum pump 4. An open / close valve 11 and a gas-liquid separator 12 are attached to the discharge pipe 9. The gas-liquid separator 12 can separate the vapor and the liquid flowing down from the discharge pipe 9, respectively, and the separated vapor is sucked into the vapor ejector 3, while the separated liquid is a pipe line. 20 is sucked through the lower ejector 10.

  The steam ejector 3 has an inlet side connected to a branch pipe 21 branched from the steam supply pipe 8, and the outlet side is again connected to the front side of the flow rate control valve 7 of the steam supply pipe 8 by a conduit 22. A part of the steam in the jacket part 2 flowing down from the pipe 9 is sucked by the steam ejector 3 and supplied again from the steam supply pipe 8 to the jacket part 2, thereby heating steam in the jacket part 2. It can be forced to circulate.

  The combination vacuum pump 4 is formed by sequentially communicating the ejector 10, the tank 13, and the circulation pump 14 through the circulation path 15. A cooling water supply pipe 16 for supplying cooling water as a cooling fluid is connected to the upper portion of the tank 13. A part of the circulation path 15 is branched to connect the excess water discharge pipe 17 and the above-described cooling fluid supply pipe 5. The cooling fluid supply pipe 5 can evaporate and cool the reaction kettle 1 by supplying a part of the circulating fluid circulating through the combination vacuum pump 4 to the cooling fluid pipe 6 of the jacket portion 2.

The left side surface of the jacket portion 2 is connected to the ejector 10 of the combination vacuum pump 4 via a pipe line 23 and an on-off valve 24. The conduit 23 is for sucking vaporized vapor of the cooling fluid generated in the jacket portion 2 to the ejector 10.

  When the object to be cooled in the reaction kettle 1 is cooled, the cooling fluid controlled to a predetermined temperature is supplied from the cooling fluid supply pipe 5 and the ejector 18 into the cooling fluid pipe 6, and the inside of the cooling fluid pipe 6 is supplied. At the same time as filling with the cooling fluid, the cooling fluid is sprayed in the tangential direction of the outer surface of the reaction vessel 1 from a plurality of cooling fluid injection nozzles 25 provided on the reaction vessel 1 side of the cooling fluid conduit 6. The sprayed cooling fluid does not jump by the fluid film by the cooling water shown by the straight line 29 in FIG. 2 supplied from the fluid film forming port 27.

On the other hand, the circulation pump 14 of the combination vacuum pump 4 is driven, and the inside of the jacket portion 2 is evacuated to a predetermined pressure state, for example, a vacuum below atmospheric pressure, through the discharge pipe 9 or the pipe line 23 by the suction force generated by the ejector 10. As a result, the cooling fluid sprayed onto the outer surface of the reaction kettle 1 takes the heat of the object to be cooled in the reaction kettle 1 and evaporates and vaporizes and cools the object to be cooled by the latent heat of vaporization. be able to.

When the reaction kettle 1 is cooled in this way, the cooling fluid 30 sprayed in the tangential direction from the cooling fluid jet nozzle 25 of the cooling fluid conduit 6 does not jump on the outer surface of the reaction kettle 1. Evaporative cooling can be performed well.

  The vaporized vapor of the cooling fluid that has cooled the object to be cooled by the jacket portion 2 and part of the cooling fluid that could not be vaporized are sucked into the ejector 10 through the discharge pipe 9 or the pipe line 23 and reach the tank 13.

  Since the suction force that can be generated in the ejector 10 is determined by the temperature of the fluid flowing down the ejector 10, the cooling water having a predetermined temperature is appropriately supplied from the cooling water supply pipe 16 to the tank 13, thereby causing the ejector 10 to flow down. The suction force of the ejector 10 can be controlled by adjusting the fluid temperature.

The block diagram which shows the Example of the vaporization cooling device of this invention. The enlarged view of the AA line cross section in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reaction kettle 2 Jacket part 4 Suction means 5 Cooling fluid supply pipe 6 Cooling fluid pipe 9 Discharge pipe 10 Ejector 13 Tank 14 Circulation pump 15 Circulation path 18 Heat exchange part 19 Steam supply pipe 25 Nozzle 27 Fluid film formation port 28 Cooling fluid Spray port

Claims (1)

A cooling chamber that cools an object to be cooled is connected to a cooling fluid supply pipe that supplies a cooling fluid in a tangential direction of the outer wall surface of the cooling chamber, and the cooling chamber is connected to a suction means. A nozzle for injecting a cooling fluid is attached to the end of the supply pipe on the cooling chamber side, the nozzle is formed by at least two cooling fluid injection ports, and one of the cooling fluid injection ports is formed on the outer wall surface of the cooling chamber. a fluid film forming orifice to form a, and the other cooling fluid injection port for spraying a cooling fluid and on the fluid film in a tangential direction of the outer wall surface of the cooling chamber the cooling fluid spray port at an outer wall surface of the cooling fluid An evaporative cooling device characterized by preventing jumping .

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